| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| <@pp.dropOutputFile /> |
| |
| |
| |
| <#list cast.types as type> |
| <#if type.major == "TargetVarlen"> |
| |
| <@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gcast/Cast${type.from}${type.to}.java" /> |
| |
| <#include "/@includes/license.ftl" /> |
| |
| package org.apache.drill.exec.expr.fn.impl.gcast; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.DrillBuf; |
| |
| import org.apache.drill.exec.expr.DrillSimpleFunc; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling; |
| import org.apache.drill.exec.expr.annotations.Output; |
| import org.apache.drill.exec.expr.annotations.Param; |
| import org.apache.drill.exec.expr.annotations.Workspace; |
| import org.apache.drill.exec.expr.holders.*; |
| import org.apache.drill.exec.record.RecordBatch; |
| |
| import javax.inject.Inject; |
| |
| /* |
| * This class is generated using freemarker and the ${.template_name} template. |
| */ |
| @SuppressWarnings("unused") |
| @FunctionTemplate(name = "cast${type.to?upper_case}", |
| scope = FunctionTemplate.FunctionScope.SIMPLE, |
| <#if type.to == 'VarChar'>returnType = FunctionTemplate.ReturnType.STRING_CAST,</#if> |
| nulls = NullHandling.NULL_IF_NULL) |
| public class Cast${type.from}${type.to} implements DrillSimpleFunc{ |
| |
| @Param ${type.from}Holder in; |
| @Param BigIntHolder len; |
| @Inject DrillBuf buffer; |
| @Output ${type.to}Holder out; |
| |
| public void setup() { |
| } |
| |
| public void eval() { |
| buffer = buffer.reallocIfNeeded((int)len.value); |
| String istr = (new ${type.javaType}(in.value)).toString(); |
| out.buffer = buffer; |
| out.start = 0; |
| out.end = Math.min((int)len.value, istr.length()); // truncate if target type has length smaller than that of input's string |
| out.buffer.setBytes(0, istr.substring(0,out.end).getBytes(java.nio.charset.StandardCharsets.UTF_8)); |
| } |
| } |
| |
| </#if> <#-- type.major --> |
| </#list> |
| |